chore(07): remove deprecated bash scripts and legacy env files

backend/check_models.py

@@ -1,12 +1,17 @@
 import os
 import google.generativeai as genai
-from dotenv import load_dotenv
+try:
+    from backend.config_loader import get_config
+except ImportError:
+    import sys
+    sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+    from backend.config_loader import get_config
 
-load_dotenv()
-API_KEY = os.environ.get("GEMINI_API_KEY")
+config = get_config()
+API_KEY = config.get("ai", {}).get("gemini_api_key")
 
 if not API_KEY:
-    print("Error: GEMINI_API_KEY not found in .env")
+    print("Error: gemini_api_key not found in config/backend.yaml, config/secrets.yaml or GEMINI_API_KEY environment variable")
     exit(1)
 
 genai.configure(api_key=API_KEY)